49. tan* x cos For the following exercises, find the exact value using half-angle formulas. cos(-12) For the follow check the ans 13. sin 8. 11t 15. sin 11n 7л 16. cos 12 8. 53. sin(4x) Зл 17. tan 12 Зл 18. tan 19. tan 12 EXTENSIOR For the following exercises, find the exact values of a) sin For the foll х х ), b) cos (), and c) tan without solving for x. 2 55. sin(2. 4 and x is in quadrant IV. 20. If tan x =- 12 and x is in quadrant III. 13 21. If sin x =- 22. If csc x = 7, and x is in quadrant II. 23. If sec x = -4, and x is in quadrant II. 57. tan(2 59. sin( 61. sir 63. co V2 – V3 15. 17. 2+ V3 19. –1 - 3V13 b. 2/13 C. 3 21. a. 13 13 2 V10 V15 120 25. 169 V6 23. a. 4 b. C. 4 3 2V13 3V/13 2

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
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Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 4E
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Please show me how to solve this problem (#21). I have attached the answers as well.. but I'd like to know how to solve. Thank you. 

49. tan* x cos
For the following exercises, find the exact value using half-angle formulas.
cos(-12)
For the follow
check the ans
13. sin
8.
11t
15. sin
11n
7л
16. cos
12
8.
53. sin(4x)
Зл
17. tan
12
Зл
18. tan
19. tan
12
EXTENSIOR
For the following exercises, find the exact values of a) sin
For the foll
х
х
), b) cos (), and c) tan
without solving for x.
2
55. sin(2.
4
and x is in quadrant IV.
20. If tan x =-
12
and x is in quadrant III.
13
21. If sin x =-
22. If csc x = 7, and x is in quadrant II.
23. If sec x = -4, and x is in quadrant II.
57. tan(2
59. sin(
61.
sir
63. co
Transcribed Image Text:49. tan* x cos For the following exercises, find the exact value using half-angle formulas. cos(-12) For the follow check the ans 13. sin 8. 11t 15. sin 11n 7л 16. cos 12 8. 53. sin(4x) Зл 17. tan 12 Зл 18. tan 19. tan 12 EXTENSIOR For the following exercises, find the exact values of a) sin For the foll х х ), b) cos (), and c) tan without solving for x. 2 55. sin(2. 4 and x is in quadrant IV. 20. If tan x =- 12 and x is in quadrant III. 13 21. If sin x =- 22. If csc x = 7, and x is in quadrant II. 23. If sec x = -4, and x is in quadrant II. 57. tan(2 59. sin( 61. sir 63. co
V2 – V3
15.
17. 2+ V3
19. –1 -
3V13
b.
2/13
C.
3
21. a.
13
13
2
V10
V15
120
25.
169
V6
23. a.
4
b.
C.
4
3
2V13 3V/13 2
Transcribed Image Text:V2 – V3 15. 17. 2+ V3 19. –1 - 3V13 b. 2/13 C. 3 21. a. 13 13 2 V10 V15 120 25. 169 V6 23. a. 4 b. C. 4 3 2V13 3V/13 2
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